Rendering moved to the client for a decade. It is moving back, and for good reasons.
Why work moved back
Client-heavy applications made interaction rich, but they also moved data fetching, dependency weight and security-sensitive coordination into the browser. Server components restore the server as a place to assemble views close to data while preserving client code for genuine interaction.
The result can be less JavaScript sent to the browser and fewer duplicated loading states. It is not a return to static pages. It is a more deliberate split between code that must run near the user and code that benefits from running near trusted systems.
Draw the boundary deliberately
Server components are suited to data access, permission-aware composition and non-interactive presentation. Client components remain necessary for local state, browser APIs, event handlers and immediate feedback. Problems appear when the boundary changes casually or data crosses it in shapes that are too large or unstable.
Treat the boundary as an application interface. Pass small serialisable values, keep secrets on the server, and make loading and error behaviour explicit.
Adopt without creating mystery
Start with routes that are read-heavy and have clear data ownership. Measure transferred JavaScript, server latency, cache behaviour and operational cost before expanding the pattern.
Teams also need debugging conventions. Logs must connect server rendering with client interaction, and developers need to know where a failure originated. The architecture is valuable when it makes the system easier to reason about, not merely newer.